The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 2005
Filed:
Apr. 19, 2000
Haruhiko Shigemasa, Yamatokoriyama, JP;
Kazuhiro Yaegawa, Yamatokoriyama, JP;
Masaaki Tanno, Hadano, JP;
Nobuhiro Shimoyama, Isehara, JP;
Tadao Takeda, Ebina, JP;
Haruhiko Shigemasa, Yamatokoriyama, JP;
Kazuhiro Yaegawa, Yamatokoriyama, JP;
Masaaki Tanno, Hadano, JP;
Nobuhiro Shimoyama, Isehara, JP;
Tadao Takeda, Ebina, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
When a built-in nonvolatile memory in a microcomputer is tested, a control program prestored in a boot ROM is run upon entering a test command from an external communication device; a test program is transferred from the external communication device to a built-in RAM through a communication circuit; a control of a CPU is switched to the built-in RAM after the test program has been transferred and a test is conducted on the nonvolatile memory; and a test result and a fail log are transferred to the external communication device through the communication circuit. Consequently, the built-in nonvolatile memory in the microcomputer can be checked without leaving the test program on the chip.